Written by

James R. Carroll

Senate Minority Leader Mitch McConnell, R-Ky., made that point in a Senate speech on Nov. 29, and in many other speeches before and since then: "We're insisting on keeping tax rates where they are, first and foremost, to protect jobs."

Last September, the nonpartisan Congressional Research Service put out a report analyzing the relationship between tax rates for the highest-income taxpayers and economic growth. ...